Despite being the 5th most visited website in the world, Wikipedia is actually managed and edited by a tiny number of humans. There is a general lack of consistency for many things, resulting in large reversals and re-reversals.http://wikipediocracy.com/2018/08/08/wikipedias-treatment-of-academics-shallow-distorted-and-sometimes-mean/ …
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There’s also lots of politically motivated editing (hasbara).
Yes, but this hasn't been studied much -- strangely. I have an idea for a study design, would be quick to do, just haven't had the time.